Adjustable window-ventilator.



O. B. LOFSTBDT.

ADJUSTABLE WINDOW VENTILATOR. APPLICATION FILED MAR. 16, 1913.

Patented J an. 27, 191i IVITNESSES:

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ADJUSTABLE WINDOW-VENTILATOR.

To all 1.0/2 am it may concern Be it known that I, OTIS B. Lorsrnnr, a citizen of the United States, residing at Grand Junction, in the county of Greene and State of Iowa, have invented a. certain new and useful Adjustable lVindow-Ventilator, of which the following is a specification.

The object of my invention is to provide a window ventilator of simple, durable and inexpensive construction.

A further object is to provide such a ventilator made in parts telescopically arranged with relation to each other so that said ventilator is adjustable to fit windows of different widths.

Still a further object is to provide such a ventilator provided with simple means for locking the sections in any of their adjusted positions.

A further object is to provide a simple adjustable means for controlling the size of the openings through which air is permitted to pass through my improved ventilator.

A further object is to provide a window ventilator made up of sections, preferably made of metal and in which each section is formed practically from a single piece so bent and constructed and so arranged with reference to the other sections and parts that air passing through the ventilator is deflected several times, thereby avoiding the inconvenience of a direct current into a room.

My invention consists in certain details, in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure 1 shows a front elevation of a window equipped with a ventilator embodying my invention viewed from inside a room. Fig. 2 shows a vertical, transverse, sectional view through the same. Fig. 3 shows a transverse, vertical, sectional view through my improved ventilator taken on the line 33 of Fig. 1. Fig. 4 shows a perspective view of one of the adjustable devices for regulating the air openings. Fig. 5 shows a vertical, longitudinal, sectional view through one end of one of the sections of my ventilator.

In the accompanying drawings I have Specification of Letters Patent.

Application filed March 15, 1913.

Patented Jan. 27,1914. Serial No. 758,052.

used the reference numeral 10 to indicate generally the frame of the window in which are mounted an upper and lower sash 11 and 12.

My improved ventilator is designed to be placed in the window just below the lower sash which must be raised sufiiciently to permit the ventilator to be placed in position. The main portion of my improved ventilator is made in two sections telescopically connected with each other. The inner section comprises a vertical longitudinal wall 13. It will be understood that each of these sections is preferably made from a single piece of metal properly bent and formed extending laterally from the lower edge of the wall 13 to the horizontal bottom 14. The metal is bent upwardly from the bottom member 14E to form what I will call the front member or wall 15 of the inner or smaller ventilator section. The wall 15 lies in a plane parallel to the plane in which the wall 13 lies, but is about twice as high as said wall 13. At the upper edge of the front wall 15 the metal is bent to form a top 16 lying in a plane parallel with the plane in which the bottom 14 rests. The top 16 is the same siZe as the bottom 14 with the exception that it is narrower to the extent of one thickness of the metal from which the sections are made. At the rearward edge of the top 16 the metal is bent downwardly to form a vertical wall 17 and then rearwardly to form a substantially horizontal wall 13 to support a sash, and then downwardly to form another vertical wall 19. The parts just described are so shaped as to leave a considerable space between the upper edge of the wall 13 and the surface of the wall 18 and to leave a space between the walls 13 and 19. The inner section, as thus described, is open at each end and is also provided with an opening at its rear side between the wall 13 and the lower edge of the wall 19. The larger or outer section is of similar construction but is sufliciently larger to permit the inner section hereinbefore described to slide freely within said outer section. The walls of the outer section which correspond with the walls of the inner section are indicated by corresponding numerals, followed in each case by a small a. At the upper edge of the wall 13 the metal is folded over to form a guide-way 20 to receive the upper edge of the wall 13 and the lower edge of the wall 19 is similarly folded over to form a guide-way 21 to receive the lower edge of the wall 19.

For locking the two sections of my ventilator in various positions of their telescopic adjustment I have provided the following means: Mounted on the outer end of the inner section is a support 22 carrying a horizontal arm or rod 23. Mounted on the adjacent end of the outer section thereof is a bearing 24: in which the arm 23 is slidably received. The arm 23 may be locked in any position of its sliding movement in the bearing 24 by means of a set-screw 25. At the outer ends of the section the walls 13 and 13 are somewhat longer than the other walls of sections. Mounted in the outer end of each section between the walls 13 and 19 and the walls 13 and 19 respectively are blocks 27 through which the extended ends of the walls 13 and 13 are secured. The blocks 27 extend beyond the ends of the sections of my ventilator and also extend below the level of said sections, as shown in Fig. 5. In the outer end of each section is slidably mounted an adjustable closure device 28 which is rectangular in cross section and is closed at its outer end and open at its inner end. At the end of each wall 15 and 15 is a laterally extending flange 29 which is shorter than the height of the walls 15 and 15-. At the closed end of the closure device 28 is a similar flange. Portions of what I shall call the front wall of the closure device 28, adjacent to the closed end and the top thereof are cut away and the openings thereby made are covered with reticulated material 31 such as fine meshed screen wire.

The practical operation of my improved window ventilator will now be described.

The devices 28 are mounted in the ends of the sections and moved to the inward limit of their movement. The sections are telescoped together, the window sash is raised and the sections are placed upon the window sill 32 with the blocks 27 resting upon the portion 33 of the window frame just. outside the sill as shown in Fig. 3. The sections of the ventilator may then be moved longitudinally until the blocks 27 engage the sides of the window frame. The sash may then be lowered until it rests upon the wall 18 when the ventilator will substantially fill the space below the sash. The set-screw 25 may be used to lock the sections in their adjusted positions. When the ventilator is installed and it is desired to close it to prevent circulation of air, the closure devices 28 are moved toward each other until they close the openings at the ends of the sections. When it is desired to admit air into the room one or both of said closure devices is slid outwardly by means of the flange 30. The warm air in the room will then pass clownwardly between the upper end of the lower sash and the lower end of the upper sash, as indicated by the arrows in Figs. 1 and 2. Cold air or fresh air from outside will pass into the sections between the walls 13 and 19 and 13 and 19, then upwardly through the space between the upper edges of the walls 13 and 13 and the walls 18 and 18 and into the main bodies of the sections. The current is then deflected and passes longitudinally through the sections of the end thereof into the closure device 28 and through the screens 31 into the room. The closure devices 28 may be adjusted accurately regulating the amount of air admitted into the room. It will be understood that the sliding movement of said closure devices is limited at one end by the ends of walls 15 and 15 which engage the flanges 30 and is limited at the other end by the window frame.

The advantages of my improved window ventilator may be largely seen from the foregoing description.

My ventilator is adjustable for windows of various sizes. The amount of air admitted can be regulated as desired by adjusting the devices 28.

I consider it important to construct my ventilator insuch a manner that the current of air passes into the ventilator with an upward movement, as hereinbefore described. On account of this feature of the construction of my ventilator, a great deal of the soot and dust carried by the air strikes against the walls 13 and 13 and drops down outside of the ventilator. The air is deflected when it reaches the walls 18 and 18 and again when it reaches the walls 15 and 15 and still again when it reaches the outer ends of the sections. 1 find that the frequent deflection of the air not only prevents a strong draft into the room but also serves to cause the dustand soot to dropto the bottom of the ventilator instead of being carried into the room. The finely meshed screen 31 prevents the particles of soot from passing into the room. The sections of my ventilator are preferably made from a single sheet of metal bent in the manner hereinbefore set forth.

It will be understood that many changes may be made in the details of the construction of my device and that I intend to cover by this application any changes in said construction which may be included within the scope of the appended claims.

I claim as my invention:

1. In a device of the class described, ventilator sections substantially rectangular in cross sections, telescopically connected with each other, said sections being provided with openings in their outer sides, closure devices slidably mounted in the outer ends of said sections said closure devices being open at their inner ends and closed at their outer ends, said closure devices being provided with openings in one side wall, reticulated material covering said openings, supports secured to the outer ends of said sections in such a manner as not to interfere with the sliding movement of said closure devices.

9. In a device of the class described, ventilator sections substantially rectangular in cross sections, telescopically connected with each other, each of said sections being provided with openings in the upper portions of one side wall. an approximately horizontal wall extending laterally from the upper end of said opening and a vertical wall extending downward from the outer end of said horizontal wall to a point below the level of said opening and above the level of the bottom of said sections, closure devices substantially rectangular in cross sections slidably mounted in the outer end of each of said sections, said closure devices being open at their inner ends and closed at their outer ends and provided with openings in one wall, supports secured to each of said sections at the outer ends thereof and extending beyond said ends in such manner as not to interfere with the sliding movement of said closure devices.

37 In a device of the class described, ventilator sections substantially rectangular in cross section telescopically connected with each other, each of said sections being provided with openings in the upper portions of one side wall, an approximately horizontal wall extending laterally from the upper end of said opening and a vertical wall extending downward from the outer end of said horizontal wall to a point below the level of said opening and above the level of the bottom of said sections, a support secured to the outer end of each section between the outer wall thereof and said downwardly extending vertical wall, said support extending beyond the ends of said sections being designed to engage the outer edge of the window base and to rest upon the sill of a window, a closure device sub stantially rectangular in cross section, open at their inner ends and closed at their outer ends, slidably mounted in the outer end of each section, each of said closure devices being provided with an opening near its outer end.

4:. In a device of the class described, ventilator sections substantially rectangular in cross sections telescopically connected with each other, each of said sections being provided with openings in the upper portions of one side wall, an approximately horizontal wall extending laterally from the upper end of said opening and a vertical wall extending downward from the outer end of said horizontal wall to a point below the level of said opening and above the level of the bottom of said sections, reticulated 'material for covering said openings and means for locking said sections in various positions of their adjustment.

A window ventilator comprising a body portion, substantially rectangular in cross section, having the upper portion of one wall cut away, an approximately horizontal wall below the top of said body extending laterally from the upper end of said opening and a vertical wall extending clownwardly from the outer end of said horizontal wall to a point belov the lower level of said opening, a closure device substantially rectangular in cross section open at its inner and closed at its outer end, slidably received in the end of said body, said closure device being provided with an opening near its outer end, a support mounted on the end of said body in position where it. does not interfere with the sliding movement of said closure device, said support extending bevond the end of said body and designed to fill the space between said body and a window frame and between a sill and a sash resting upon said substantially horizontal wall.

Des Moines, Iowa, March 1, 1913.

OTIS B. LOFSTEDT.

Witnesses M. \VALLACE, S. ROBINSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

